# RPN vs RLM

The clearest difference is in-app purchases: RPN at none against RLM's 4. RPN also leads on review sentiment (100% vs 67%) and iOS requirement (12.0 vs 26.0). RLM's advantage is update cadence (every 4 weeks vs every 7 months). On price, rating, ratings volume and ads there is nothing between them.

Both are free to download. RLM sells 4 in-app purchases, starting at $0.49 per month. RPN asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 4.7 for RPN against 4.9 for RLM. Both are backed by a comparable volume of ratings — 11 and 7 respectively. Written reviews are what separate them: 100% of RPN's written reviews are positive against 67% of RLM's.

RPN ships an update every 7 months, RLM every 4 weeks. The most recent releases landed on November 1, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | RPN | RLM |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.7 (11 ratings)](https://appshunter.io/ios/app/rpn-70-sd/id738422213/reviews) | **[4.9 (7 ratings)](https://appshunter.io/ios/app/rlm-19bx/id1597086394/reviews)** |
| Number of ratings | **11** | 7 |
| Positive reviews | **100.0% of reviews** | 66.7% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 7 months | **Every 4 weeks** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 17 MB | 7 MB |
| Requires iOS | **12.0** | 26.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [CuVee Software](https://appshunter.io/developer/424873503) | [R.L.M. Software](https://appshunter.io/developer/289639238) |

## What reviewers say

### RPN

[App page](https://appshunter.io/ios/app/rpn-70-sd/id738422213)

This app is a faithful simulation of a rare 1974 financial calculator, offering all its original functions with enhanced features like more memory registers and a visual stack display. It's designed for users who appreciate vintage technology and need precise financial calculations.

**Highlights:** Photo-realistic vintage calculator design, Full HP-70 function simulation, Animated keys with sound, Enhanced stack and memory register view, Cut/copy/paste display value, Input parameter visual indicators

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### RLM

[App page](https://appshunter.io/ios/app/rlm-19bx/id1597086394)

This app offers a comprehensive suite of financial, business, scientific, and statistical calculators. It includes specialized worksheets for loan amortization, bond pricing, currency exchange, probability distributions, and complex number operations. Users can also perform date and time calculations, solve arbitrary equations, and convert units.

**Highlights:** Finance worksheets (amortization, bonds, options), Business tools (bill split, break-even, currency), Statistical analysis (probability, regressions), Scientific functions (complex numbers, vectors), Unit and currency conversions, Equation solver, Date and time calculations

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Subscription | $0.49 | per month |
| Semi-Annual Subscription | $2.99 | per 6 months |
| Annual Subscription | $5.99 | per year |
| Lifetime Purchase | $9.99 | one-time |


## Frequently asked questions

### Is RPN free?

RPN is free to download, with no in-app purchases.

### Is RLM free?

RLM is free to download, with in-app purchases available.

### Which has better reviews, RPN or RLM?

RLM is rated higher. RPN averages 4.7 out of 5 from 11 ratings, while RLM averages 4.9 from 7 ratings.

### Do RPN or RLM have ads?

Neither RPN nor RLM shows ads.

### Which is updated more often, RPN or RLM?

RPN ships an update every 7 months, and RLM every 4 weeks. Most recently, RPN was updated on November 1, 2026 and RLM on November 3, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*